Power Supply - RACOM RAy3-11 User Manual

4.6. Power supply

RAy microwave unit can be powered by active PoE, passive PoE or by DC power source. All variants
of power are supplied through RJ45 Ethernet connector (in slot ETH1+POE). Detailed description and
technical parameters of the connector are described in Section 1.3.1, "RJ45 connector (ETH1+POE)".
Fig. 4.28: Power supply possibilities
Type of power supply has to be chosen according voltage range and maximum power consumption
(Watts) of installed unit. Both those parameters are listed on each unit Product label and can be found
also in Chapter 9, Technical parameters, in RAy datasheets and on RAy web pages
If a longer Ethernet or DC cable than few meters is used, then both voltage and Watts of power supply
has to be adequately higher to cover the power loss within the Ethernet or DC cable.
RACOM is offering a set of reliable power supplies (sourced by AC or DC power) for all RAy models
and all typical use-cases, all guaranteed for compatibility with RAy unit and tested for long-term stability
– they are listed in Powering section
4.6.1. PoE power sourcing
PoE (Power over Ethernet) is the most widely used power sourcing for RAy units. It simplifies the unit
installation with a single cable both for Ethernet connection and power.
Both active or passive PoE can be used. The key difference between those is that Active PoE power
supplies have a special circuits and a detection chip, which classifies power requirements of connected
device before powering it, while passive PoE just powers Ethernet wires without any check of the
connected device. All RAy units accept the power sourcing from both PoE types because wiring defined
by IEEE 802.3at/bt standards for active PoE is used also for passive PoE.
Note
All PoE installations require reasonably quality Ethernet cables and connectors, otherwise the
proper PoE function can not be guaranteed.
• Active PoE power supply recognize each RAy unit as IEEE 802.3bt (PoE++) or IEEE 802.3at
(PoE+) standard-compliant device. The IEEE standards define negotiation method, wires to be used,
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https://www.racom.eu/eng/products/microwave-link-detail#specifications
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https://www.racom.eu/eng/products/microwave-link-detail#accessories_poe
© RACOM s.r.o. – RAy3 Microwave Link
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of RAy web site.
Installation
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